FLJ is quite powerful; however,…
Compared to the other cards that were released with or right after FLJ it has *never fueled a tier 1 deck and even, tbh, had issues fueling a high-end tier 2 deck. FLJ was fine for the meta it was introduced into and for that reason will also probably never be much of an issue in Wild.
FLJ is fine as it is for Standard the past 5 expansions and Wild